One of the folding knives was less than three inches long, while the other was longer than three inches, police said.
"The juvenile did not display the knife or threaten anyone with it," police wrote in an email. "No one was injured."
The student is charged with one count of possession of a weapon on school property.
"We take very seriously our responsibility to provide a safe and supportive learning environment that is free from disruption. Students who violate student conduct regulations are subject to suspension and/or expulsion, and, if the offense is a violation of the law, to prosecution," Chesterfield Schools Spokesman Shawn Smith wrote in a statement when asked about the incident.